Investing in the tropical Mount Cinnamon Resort in Grenada, with its white sand beaches, buys more than a slice of paradise — it comes with citizenship and a passport with visa-free entry to almost 130 countries.

Few who take up the offer might ever visit their new homeland, but for cash-strapped Caribbean states such

"It's bringing in an enormous amount of money, and it's helping us to reduce our debt burden in a very serious way,"